Hi cherylks
Just to add that if you are having a hysterosocopy you don't necessarily need a general anaesthetic if the gynae is good. I had no anaesthetic at all and felt almost nothing. Just took the recommended painkillers an hour before the procedure. Others though have had different expereinces so maybe find out about the gyane who might do the prcoedure. I didn't want a GA as have never had one but was quite happy seeing it all happen, legs undignified in stirrups!!
Also if you have had endometriosis - are there are deposits outside the uterus - because I think oral progestogen is recommended? Here is what it says on this site:
Endometriosis
There is a small risk of reactivation of endometriosis with HRT use and any recurrence of symptoms should be reported. If a hysterectomy has been performed for endometriosis, the choice of HRT use thereafter should be influenced by the extent of endometriosis at the time of the operation. Since hysterectomy often causes a premature menopause, it is often advised to take HRT until the average age of the menopause; 51 years. HRT after hysterectomy usually consists of estrogen only. However, in the presence of endometriosis, estrogen may cause stimulation of residual deposits and consideration should be given to using continuous combined (estrogen plus daily progestogen) therapy, or tibolone, though little research has been done on the effect of different types and duration of therapy. Medical treatment of endometriosis often involves ovarian suppression which, along with ovarian removal, may increase the risk of osteoporosis.
A Mirena as others have said would definitely keep the lining thin and as you thought oestrogen is not given to "balance" the side effects of progestogen - but to alleviate the menopausal symptoms of oestrogen deficiency. Addition of oestrogen is unlikely to affect your experience of side effects from progestogens, but conversely, the progestogen will prevent the womb lining over-thckening as a result of stimulation by added oestrogen!
Hurdity x